Realistic Air Resistance and Fuel Consumption for ATS 1.60

In update 1.58, the developers broke the air resistance parameter. This mod makes it realistic again and aims to restore real fuel consumption.

I need feedback on how the mod behaves at different speeds and with different loads. This is my first mod. I usually drive above 75 mph and I was annoyed when fuel consumption became noticeably lower than real-world values. At the moment, the mod is mainly tuned for those speeds.